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I have a form with 26 textboxes on it. I need each textbox to have text that is unique from any other textbox on the form. What is an easy way to do this?
Thanks
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Do you want to check whether the texts is unique or do you want to fill the textbox ?
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I want to check if the text is unique from the other 25 textboxes on the form.
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Well the simplest way I can think of off the top of my head is to put the text boxes in a List<textbox> and use nested loops like:
<br />
public bool ValidateTextBoxen()<br />
{<br />
List<TextBox> textBoxen = new List<TextBox>();<br />
<br />
textBoxen.Add(TextBox1);<br />
textBoxen.Add(TextBox2);<br />
...<br />
textBoxen.Add(TextBoxN);<br />
<br />
for(int i = 0; i < textBoxen.Count; i++)<br />
{<br />
for(int k = 0; k < textBoxen.Count; k++)<br />
{<br />
if (textBoxen[i].Text == textBoxen[k].Text && i != k )<br />
return false;<br />
}<br />
}<br />
<br />
return true<br />
}<br />
-- modified at 15:37 Tuesday 25th July, 2006
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Dictionary<string, object> stringProbe = new Dictionary<string, object> ();
stringProbe[textBox1.Text] = null;
...
stringProbe[textBox25.Text] = null;
if (stringProbe.ContainsKey(mustBeUniqueTextBox.Text))
{
// Text is not unique
}else
{
//Text is unique
}
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Hi Guys...
Rather urgent question...
I need to be able to browse all available windows domains on the local network, but the kicker is that I can't garentee that the machine that the app is running on is a member of any domain...?
Does anyone know of a function that can enumerate the domains available?
All the looking I've done requires you to have a domain to start with and if the machines in a work group then how can i look out from that???
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If you could discover all the domains within a network without being part of the domain, MS would have had one MAJOR security hole sitting out there that would have killed them.
Your computer and your user must be part of a domain. From there you still will not see ALL domains. You will only see those domains that trust the domain you are a part of.
Though you should keep in mind that this is specific to the old domain model. For ActiveDirectory and a network that has eliminated the domain controllers, you would have to be part of ActiveDirectory and have the rights to query the AD tree.
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Sorry I don't understand...
if that's the case how does windows provide you with a list of domains that you can join a machine too????
and where do the listings for work groups come from????
I suspect WINS but can't confirm this or find a way to access the information.
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RobStroud wrote: how does windows provide you with a list of domains that you can join a machine too????
It's been many, many years since I added a machine to a domain, but I believe I had to be logged into the domain as an administrator or some other group that has the rights to do the add.
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I have a static data access class. By using the is statement in catch blocks I've followed the exception up the call stack, monitoring it's type as I go. Up until it's thrown beyond the static class it's a System.SpecificTypeException. At the next layer up however, the type information has been lost and it's only a ordinary System.Exception. The loss of type data is cuasing problems for my high level error handler because it uses the type information to help provide useful advise about how to resolve the fundamental problem. Is there any workaround I could use to avoid this problem?
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The exception type that you see is dependant upon HOW you are catching your exception. For example:
...
catch ( Exception ex )
will catch your exception and downcast it to the System.Exception. But if you did this:
...
catch ( SpecificTypeException ex )
then you would not be downcasting it. However your caught exception should also be of type SpecificTypeException unless the catch logic in the framework is mangling it.
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I'm not sure I'm following you. Going up the callstack prior to the switch between the static data acess class and the main app the following code will evaluate the if statement as true of the original exeception was one of hte types being checked.
catch (Exception ex)
{
if (ex is System.Xml.XmlException || ex is System.Xml.Schema.XmlSchemaException)
{
int i = 5;
throw;
}
}
Experimentally I added catch ( System.Xml.XmlException ex) and catch (System.Xml.Schema.XmlSchemaException ex) blocks in front of the catch (Exception ex) blocks at each level of the call tree.
I continue to see the same behavior I described in my original post. One thing I forgot to mention then, at the same time I go from the static class to the main app, I get a VS unhandled exception dialog with the full exception data and break/continue/ignore(disabled)/help buttons.
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If I understand what you are saying,
You see an exception occur in the static class.
You then see the VS dialog.
You then see the second catch and it is now a System.Exception.
Is that correct? If so, then maybe VS is getting in the way of the type.
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hi all i have a question over here regarding entry points..
my actual question is i have linked up 2 forms together..the code is actually from two separate projects..the pro now is when i wanna debug my soln i get this error msg--"...has more than 1 entry point defined"
static void main()
{
Application.Run(new frmTest());
}
i try delete the above code from the 2nd form but it cant work.. wht am i supposed to do to ensure when im linked to the second link my application will run smoothly??
detailed help with codes posted will b greatly appreciated as im new to c# but im willing to learn
thanks
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You can only have 1 active project, and in this project you can only have 1 Main() method.
Use "Find in files..." to find "main" method.
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Hi everybody,
How can I make a column invisble in a DataGrid or how can I give a value to each row besides what is written in it.
Thanks,
Oren
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THANKS!!!
That is perfectly what I needed.
Thank you Ankita. 
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HI, I am new to c# programming. How can I get a simple menu system? I am using visual c# 2005. I only want a print, new document, open docunment, save document and help button, how can I do this. Thank you in advance.
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1. Add ToolStripContainer (from Toolbox) to your form.
2. Set toolStripContainer.Dock = All.
3. Add MenuStrip (from Toolbox) to the top of the toolStripContainer.
4. Select menuStrip and type captions for your menu items.
5. Select menu item and add handler to its Click event.
6. Repeat step 5 for all menu items.
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using System;
class test
{
private static int add(int x,int y)
{
return x+y;
}
public int calling(int x, int y)
{
int k;
test obj=new test();
k=obj.add(x,y);
return k;
}
}
class now
{
public static void Main()
{
int sum,x,y;
Console.WriteLine("enter x -->> ");
x=int.Parse(Console.ReadLine());
Console.WriteLine("enter y -->> ");
y=int.Parse(Console.ReadLine());
test obj1=new test();
sum=obj1.calling(x,y);
Console.WriteLine("the value is --> {0}",sum);
}
}
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Define "not working."
"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank
"Judge not by the eye but by the heart." - Native American Proverb
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1. You don't need to create an instance of class test to use the add function, since add is a static function.
int sum = test.add(1, 7);
If the add function was not a static function, you would need to create an instance of test:
test myTest = new test();
int sum = myTest.add(1, 7);
2. the way you have it coded, the calling function is useless. You may have intended to make calling static, not add.
Review static objects in classes.
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the method add and the entry point method main() are in different classes so an object will be required to call add. not exactly an object but add will be called using the class name instead of the object name. further the add is a private method and it is being called through the public method calling. now method calling is also in a different class from the class in which entry point is. now to use calling we have to create an object but it is not working. i don't know why. please look at it once more.
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